Hi When updating content in the html editor i get an error. checking the log returns:

2013-03-11 12:12:03,628 ERROR 10.20.96.58 - en-GB - /HtmlEdit.aspx?mid=773&pageid=15 - mojoPortal.Web.Global -  Referrer(http://THESITE/HtmlEdit.aspx?mid=773&pageid=15) useragent Mozilla/5.0 (Windows NT 6.1) AppleWebKit/537.22 (KHTML, like Gecko) Chrome/25.0.1364.152 Safari/537.22 

System.Configuration.ConfigurationErrorsException: Could not load type 'mojoPortal.Business.WebHelpers.IndexBuilderProvider' from assembly 'mojoPortal.Business.WebHelpers, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null'. ---> System.TypeLoadException: Could not load type 'mojoPortal.Business.WebHelpers.IndexBuilderProvider' from assembly 'mojoPortal.Business.WebHelpers, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null'.
   at System.RuntimeTypeHandle.GetTypeByName(String name, Boolean throwOnError, Boolean ignoreCase, Boolean reflectionOnly, StackCrawlMarkHandle stackMark, Boolean loadTypeFromPartialName, ObjectHandleOnStack type)
   at System.RuntimeTypeHandle.GetTypeByName(String name, Boolean throwOnError, Boolean ignoreCase, Boolean reflectionOnly, StackCrawlMark& stackMark, Boolean loadTypeFromPartialName)
   at System.Type.GetType(String typeName, Boolean throwOnError, Boolean ignoreCase)
   at System.Web.Compilation.BuildManager.GetType(String typeName, Boolean throwOnError, Boolean ignoreCase)
   at System.Web.Configuration.ConfigUtil.GetType(String typeName, String propertyName, ConfigurationElement configElement, XmlNode node, Boolean checkAptcaBit, Boolean ignoreCase)
   --- End of inner exception stack trace ---
   at System.Web.Configuration.ConfigUtil.GetType(String typeName, String propertyName, ConfigurationElement configElement, XmlNode node, Boolean checkAptcaBit, Boolean ignoreCase)
   at System.Web.Configuration.ProvidersHelper.InstantiateProvider(ProviderSettings providerSettings, Type providerType)
   at System.Web.Configuration.ProvidersHelper.InstantiateProviders(ProviderSettingsCollection configProviders, ProviderCollection providers, Type providerType)
   at mojoPortal.SearchIndex.IndexBuilderManager.Initialize()

server details:

mojoPortal Version 2.3.9.5 MSSQL
Operating System Microsoft Windows NT 6.1.7601 Service Pack 1
ASP.NET Info v4.0.30319 Running in Full Trust
Server Time Zone GMT Standard Time
Server Local Time (GMT 0) 11/03/2013 12:15:03
Greenwich Mean Time (GMT/UTC) 11/03/2013 12:15:03
 

I am having this issue on my local PC when I upgraded a site from 2.3.8.5 to 2.3.9.7 (always text locally first!).  I made sure I updated both FromWizPro and EventCalPro 

STS_EventCalendar 3.4.1.3
sts-FormWizard 2.6.1.0

mojoPortal Version 2.3.9.7 MSSQL
Operating System: Microsoft Windows NT 6.1.7601 Service Pack 1
ASP.NET Info: v4.0.30319 Running in Full Trust

Any idea what the problem could be?

2013-05-28 08:34:15,601 ERROR 192.168.1.6 - en-US - /HtmlEdit.aspx?mid=53&pageid=31 - mojoPortal.Web.Global -  Referrer(http://localhost:1060/HtmlEdit.aspx?mid=53&pageid=31) useragent Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/27.0.1453.94 Safari/537.36 
System.Configuration.ConfigurationErrorsException: Could not load type 'mojoPortal.Business.WebHelpers.IndexBuilderProvider' from assembly 'mojoPortal.Business.WebHelpers, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null'. ---> System.TypeLoadException: Could not load type 'mojoPortal.Business.WebHelpers.IndexBuilderProvider' from assembly 'mojoPortal.Business.WebHelpers, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null'.
   at System.RuntimeTypeHandle.GetTypeByName(String name, Boolean throwOnError, Boolean ignoreCase, Boolean reflectionOnly, StackCrawlMarkHandle stackMark, IntPtr pPrivHostBinder, Boolean loadTypeFromPartialName, ObjectHandleOnStack type)
   at System.RuntimeTypeHandle.GetTypeByName(String name, Boolean throwOnError, Boolean ignoreCase, Boolean reflectionOnly, StackCrawlMark& stackMark, IntPtr pPrivHostBinder, Boolean loadTypeFromPartialName)
   at System.Type.GetType(String typeName, Boolean throwOnError, Boolean ignoreCase)
   at System.Web.Compilation.BuildManager.GetType(String typeName, Boolean throwOnError, Boolean ignoreCase)
   at System.Web.Configuration.ConfigUtil.GetType(String typeName, String propertyName, ConfigurationElement configElement, XmlNode node, Boolean checkAptcaBit, Boolean ignoreCase)
   --- End of inner exception stack trace ---
   at System.Web.Configuration.ConfigUtil.GetType(String typeName, String propertyName, ConfigurationElement configElement, XmlNode node, Boolean checkAptcaBit, Boolean ignoreCase)
   at System.Web.Configuration.ProvidersHelper.InstantiateProvider(ProviderSettings providerSettings, Type providerType)
   at System.Web.Configuration.ProvidersHelper.InstantiateProviders(ProviderSettingsCollection configProviders, ProviderCollection providers, Type providerType)
   at mojoPortal.SearchIndex.IndexBuilderManager.Initialize()

Feature Versions 

Feature Schema Version
blog 2.6.1.2
contactform 0.0.0.6
eventcalendar 0.0.0.6
feed-manager 0.0.1.0
forums 2.2.0.2
imagegallery 0.0.0.8
kdmediaplayer 1.0.0.1
linksmodule 0.0.0.9
MegaGallery 0.0.0.7
pollfeature-byChristianFredh 0.0.0.5
sharedfiles 1.0.0.0
STS_EventCalendar 3.4.1.3
sts-FormWizard 2.6.1.0
surveyfeature 1.8.0.0
webstore 0.0.7.3